In soap, I can't tell a difference. In body butter's, oil and scrubs it s a great oil because it obsorbs quickly. In any product grapeseed oil is suppose to help strengthen blood vessels and has antioxidant properties. It's particular value is part of an eczema moisturizing treatment because it brings cellular rebuilding properites deep bleow the skin's surface to moisturize and aid in protecting skin tissue.
I use grapeseed oil in my "Happy Horse" goat milk soap with a few other oils, and also with my Lotion Bars which feel wonderful on the skin, both horse and human seem to like the results.
I love grapeseed oil, but I do not use it in my soaps. I find the shelf life to be too short for my liking. I once smelled a rancid soap made with grapeseed oil in a swap that I will never forget. :shock:
Since I stopped using grapeseed oil in my CP soaps, they last longer. I suspect that grapeseed oil must have a rather short shelf life. So I use it only in soaps that I will use up quickly.